usr.bin/window/wwframe.c

   1 /*      $NetBSD: wwframe.c,v 1.6 2002/06/14 01:06:59 wiz Exp $  */
   2
   3 /*
   4  * Copyright (c) 1983, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Edward Wang at The University of California, Berkeley.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)wwframe.c   8.1 (Berkeley) 6/6/93";
  39 #else
  40 __RCSID("$NetBSD: wwframe.c,v 1.6 2002/06/14 01:06:59 wiz Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 #include "ww.h"
  45 #include "tt.h"
  46
  47 #define frameok(w, r, c) (w1 = wwindex[wwsmap[r][c]], \
  48         w1->ww_fmap || w1->ww_order > (w)->ww_order)
  49
  50 void
  51 wwframe(struct ww *w, struct ww *wframe)
  52 {
  53         int r, c;
  54         char a1, a2, a3;
  55         char b1, b2, b3;
  56         int code;
  57         struct ww *w1;
  58
  59         if (w->ww_w.t > 0) {
  60                 r = w->ww_w.t - 1;
  61                 c = w->ww_i.l - 1;
  62                 a1 = 0;
  63                 a2 = 0;
  64                 b1 = 0;
  65                 b2 = c < 0 || frameok(w, r, c);
  66
  67                 for (; c < w->ww_i.r; c++) {
  68                         if (c + 1 >= wwncol) {
  69                                 a3 = 1;
  70                                 b3 = 1;
  71                         } else {
  72                                 a3 = w->ww_index == wwsmap[r + 1][c + 1];
  73                                 b3 = frameok(w, r, c + 1);
  74                         }
  75                         if (b2) {
  76                                 code = 0;
  77                                 if ((a1 || a2) && b1)
  78                                         code |= WWF_L;
  79                                 if ((a2 || a3) && b3)
  80                                         code |= WWF_R;
  81                                 if (code)
  82                                         wwframec(wframe, r, c, code|WWF_TOP);
  83                         }
  84                         a1 = a2;
  85                         a2 = a3;
  86                         b1 = b2;
  87                         b2 = b3;
  88                 }
  89                 if ((a1 || a2) && b1 && b2)
  90                         wwframec(wframe, r, c, WWF_L|WWF_TOP);
  91         }
  92
  93         if (w->ww_w.b < wwnrow) {
  94                 r = w->ww_w.b;
  95                 c = w->ww_i.l - 1;
  96                 a1 = 0;
  97                 a2 = 0;
  98                 b1 = 0;
  99                 b2 = c < 0 || frameok(w, r, c);
 100
 101                 for (; c < w->ww_i.r; c++) {
 102                         if (c + 1 >= wwncol) {
 103                                 a3 = 1;
 104                                 b3 = 1;
 105                         } else {
 106                                 a3 = w->ww_index == wwsmap[r - 1][c + 1];
 107                                 b3 = frameok(w, r, c + 1);
 108                         }
 109                         if (b2) {
 110                                 code = 0;
 111                                 if ((a1 || a2) && b1)
 112                                         code |= WWF_L;
 113                                 if ((a2 || a3) && b3)
 114                                         code |= WWF_R;
 115                                 if (code)
 116                                         wwframec(wframe, r, c, code);
 117                         }
 118                         a1 = a2;
 119                         a2 = a3;
 120                         b1 = b2;
 121                         b2 = b3;
 122                 }
 123                 if ((a1 || a2) && b1 && b2)
 124                         wwframec(wframe, r, c, WWF_L);
 125         }
 126
 127         if (w->ww_w.l > 0) {
 128                 r = w->ww_i.t - 1;
 129                 c = w->ww_w.l - 1;
 130                 a1 = 0;
 131                 a2 = 0;
 132                 b1 = 0;
 133                 b2 = r < 0 || frameok(w, r, c);
 134
 135                 for (; r < w->ww_i.b; r++) {
 136                         if (r + 1 >= wwnrow) {
 137                                 a3 = 1;
 138                                 b3 = 1;
 139                         } else {
 140                                 a3 = w->ww_index == wwsmap[r + 1][c + 1];
 141                                 b3 = frameok(w, r + 1, c);
 142                         }
 143                         if (b2) {
 144                                 code = 0;
 145                                 if ((a1 || a2) && b1)
 146                                         code |= WWF_U;
 147                                 if ((a2 || a3) && b3)
 148                                         code |= WWF_D;
 149                                 if (code)
 150                                         wwframec(wframe, r, c, code);
 151                         }
 152                         a1 = a2;
 153                         a2 = a3;
 154                         b1 = b2;
 155                         b2 = b3;
 156                 }
 157                 if ((a1 || a2) && b1 && b2)
 158                         wwframec(wframe, r, c, WWF_U);
 159         }
 160
 161         if (w->ww_w.r < wwncol) {
 162                 r = w->ww_i.t - 1;
 163                 c = w->ww_w.r;
 164                 a1 = 0;
 165                 a2 = 0;
 166                 b1 = 0;
 167                 b2 = r < 0 || frameok(w, r, c);
 168
 169                 for (; r < w->ww_i.b; r++) {
 170                         if (r + 1 >= wwnrow) {
 171                                 a3 = 1;
 172                                 b3 = 1;
 173                         } else {
 174                                 a3 = w->ww_index == wwsmap[r + 1][c - 1];
 175                                 b3 = frameok(w, r + 1, c);
 176                         }
 177                         if (b2) {
 178                                 code = 0;
 179                                 if ((a1 || a2) && b1)
 180                                         code |= WWF_U;
 181                                 if ((a2 || a3) && b3)
 182                                         code |= WWF_D;
 183                                 if (code)
 184                                         wwframec(wframe, r, c, code);
 185                         }
 186                         a1 = a2;
 187                         a2 = a3;
 188                         b1 = b2;
 189                         b2 = b3;
 190                 }
 191                 if ((a1 || a2) && b1 && b2)
 192                         wwframec(wframe, r, c, WWF_U);
 193         }
 194 }
 195
 196 void
 197 wwframec(struct ww *f, int r, int c, char code)
 198 {
 199         char oldcode;
 200         unsigned char *smap;
 201
 202         if (r < f->ww_i.t || r >= f->ww_i.b || c < f->ww_i.l || c >= f->ww_i.r)
 203                 return;
 204
 205         smap = &wwsmap[r][c];
 206
 207         {
 208                 struct ww *w;
 209
 210                 w = wwindex[*smap];
 211                 if (w->ww_order > f->ww_order) {
 212                         if (w != &wwnobody && w->ww_win[r][c] == 0)
 213                                 w->ww_nvis[r]--;
 214                         *smap = f->ww_index;
 215                 }
 216         }
 217
 218         if (f->ww_fmap != 0) {
 219                 char *fmap;
 220
 221                 fmap = &f->ww_fmap[r][c];
 222                 oldcode = *fmap;
 223                 *fmap |= code;
 224                 if (code & WWF_TOP)
 225                         *fmap &= ~WWF_LABEL;
 226                 code = *fmap;
 227         } else
 228                 oldcode = 0;
 229         {
 230                 char *win = &f->ww_win[r][c];
 231
 232                 if (*win == WWM_GLS && *smap == f->ww_index)
 233                         f->ww_nvis[r]++;
 234                 *win &= ~WWM_GLS;
 235         }
 236         if (oldcode != code && (code & WWF_LABEL) == 0) {
 237                 short frame;
 238
 239                 frame = tt.tt_frame[code & WWF_MASK];
 240                 f->ww_buf[r][c].c_w = frame;
 241                 if (wwsmap[r][c] == f->ww_index) {
 242                         wwtouched[r] |= WWU_TOUCHED;
 243                         wwns[r][c].c_w = frame;
 244                 }
 245         }
 246 }